Qingnian Zhang

ORCID: 0009-0001-0527-7231
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About
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Research Areas
  • Advanced Computational Techniques and Applications
  • Geographic Information Systems Studies
  • Remote Sensing and Land Use
  • Hydrology and Watershed Management Studies
  • Land Use and Ecosystem Services
  • Evaluation Methods in Various Fields
  • Environmental Changes in China
  • Transportation Planning and Optimization
  • Urban Design and Spatial Analysis
  • Civil and Geotechnical Engineering Research
  • Urban Heat Island Mitigation
  • Rangeland Management and Livestock Ecology
  • Tropical and Extratropical Cyclones Research
  • Complex Network Analysis Techniques
  • Data Management and Algorithms
  • Groundwater and Watershed Analysis
  • Environmental and Agricultural Sciences
  • Climate Change and Health Impacts
  • Cognitive Science and Education Research
  • Coastal wetland ecosystem dynamics
  • Climate change and permafrost
  • Coastal and Marine Dynamics
  • Urban Transport and Accessibility
  • Flood Risk Assessment and Management
  • Artificial Immune Systems Applications

Sun Yat-sen University
2004-2024

The Pearl River Estuary (PRE) frequently experiences the impacts of typhoons, storm surges, and saltwater intrusion. While previous research has mainly focused on intrusion during dry season, there is limited caused by surges in PRE. In this study, we systematically investigate effects ten typical autumnal typhoons associated Modaomen Waterway using situ data water level, river discharge, chloride concentrations from 2006 to 2022. We introduce concept Storm surge-Induced Salinity...

10.3390/su16062254 article EN Sustainability 2024-03-07

As high temperature and heat wave have become great threats to human survival, social stability, ecological safety, it is of significance master the spatial temporal dynamic changes prevent risks. The meteorological station can provide accurate near ground temperature, but only within a specific space time. In order meet needs large-scale research, interpolation methods were widely used obtain spatially continuous maps. However, these often ignore influence external factors on such as land...

10.1109/jstars.2023.3260467 article EN cc-by IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 2023-01-01

In this paper, two different topology types (including L-space and P-space) were introduced to build the networks for Guangzhou metro. Some important parameters calculated, such as, degree, clustering coefficient average distance of network. And key stations, shortest distance, time-spent, transfer times obtained analyzing characteristic networks, degree is 2.092. Only a few stations have high Tiyuxilu. They become The pass-by time-spent between any 21.08km, 13.44 27.38min separately....

10.1109/geoinformatics.2014.6950806 article EN 2014-06-01

AbstractMap generalisation is an abstraction process that seeks to transform the representation of cartographic objects from original version into a coarser one. The characteristics and arrangement map features have be observed preserved in process. A method developed for typifying drainages while preserving their structural characteristics, i.e.presenting with reduced number rivers under constraint structure terms type distribution rivers. We apply Töpfer's radical law calculate amount...

10.1179/000870407x241872 article EN The Cartographic Journal 2007-12-01

The central area of a city is an important functional unit in many urban studies. It region where business concentrates and municipal facilities densely distribute. Traditionally, statistics economic social phenomena can be used to delimitate their boundaries. However, traditional methods based on investigation are labor-intensive sometimes inaccurate. Alternatively, road networks acting as kind infrastructure reflect the association locations. Thus concentration indicates congestion...

10.1117/12.813172 article EN Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE 2008-10-28

Land use is an important field in the global environment change. This paper, taking Luocun town of NanHai District Foshan city as example, with help GIS technology, mathematics model and landscape-ecology theory, analyses landscape pattern's changes land-use from different region scales levels(the whole luocun Town every village Town). The study shows that fragmentation level increased. edge degree PD are increased, contagion indexes but LPI decreased. It suggests fragment separate increased...

10.1117/12.813066 article EN Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE 2008-10-24

Recently complex networks have aroused the attention from a number of scholars, raising upsurge studying networks. High degree seeking strategy (DS) has been proved to be an effective algorithm searching This paper puts forward two algorithms improve high by adding criteria selection neighboring nodes. According improved algorithms, degrees and distances neighbors' neighbor will compared when or more neighbors currently processed node highest degree. Experiments are carried out compare...

10.1117/12.812863 article EN Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE 2008-10-29
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